243221021033 has 16 divisors (see below), whose sum is σ = 258192909120. Its totient is φ = 228822667200.

The previous prime is 243221021003. The next prime is 243221021047. The reversal of 243221021033 is 330120122342.

It is a cyclic number.

It is not a de Polignac number, because 243221021033 - 2¹² = 243221016937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243221021003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780083 + ... + 1046408.

It is an arithmetic number, because the mean of its divisors is an integer number (16137056820).

Almost surely, 2^243221021033 is an apocalyptic number.

It is an amenable number.

243221021033 is a deficient number, since it is larger than the sum of its proper divisors (14971888087).

243221021033 is a wasteful number, since it uses less digits than its factorization.

243221021033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826648.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 243221021033 its reverse (330120122342), we get a palindrome (573341143375).

The spelling of 243221021033 in words is "two hundred forty-three billion, two hundred twenty-one million, twenty-one thousand, thirty-three".